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cupoosta [38]
3 years ago
10

2x - x = 3x - 12 what does x equal

Mathematics
1 answer:
zloy xaker [14]3 years ago
5 0

Answer:

2x-3x- x=-12

-2x= -12

x=6

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Penny has 139 postcards in her collection. Abe has 48 postcards in his collection. Then Abe gives his collection away. He divide
erik [133]

Answer:

145

Step-by-step explanation:

Divide 48 by 7 = 6≅. then add 6 to 139. 145

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3 years ago
(33)(1/9 2−6+2) solve
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(33)(1/9•2-6+2)
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Find the first five terms of the sequence. an=-n2+2n
Julli [10]

If your sequence is this

an =   - {n}^{2}  + 2n \\ then \\ a1 =  - 1 + 2 = 1 \\ a2 =  - 4 + 4 = 0 \\ a3 =  - 9 + 6 =  - 3 \\ a4 =  - 16 + 8 =  - 8 \\ a5 =  - 25 + 10 =  - 15

3 0
3 years ago
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I need help on this question
rewona [7]

x = -7

hope this helps!

8 0
3 years ago
Twenty words were randomly selected from two textbooks. Each set gives the number of letters in each of the twenty words for tha
Alborosie

Answer:

k = 13The smallest zero or root is x = -10

Step-by-step explanation:

you can write "x^2" to mean "x squared"

f(x) = x^2+3x-10

f(x+5) = (x+5)^2+3(x+5)-10 ... replace every x with x+5

f(x+5) = (x^2+10x+25)+3(x+5)-10

f(x+5) = x^2+10x+25+3x+15-10

f(x+5) = x^2+13x+30

Compare this with x^2+kx+30 and we see that k = 13

Factor and solve the equation below

x^2+13x+30 = 0

(x+10)(x+3) = 0

x+10 = 0 or x+3 = 0

x = -10 or x = -3

The smallest zero is x = -10 as its the left-most value on a number line.

7 0
3 years ago
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